WICHITA, Kan. (AP) — Court documents say a Kansas undersheriff who shot and killed a man with a beanbag round hadn’t been trained on how to properly use the weapon.

A police expert says in a report for the prosecution that the lack of training led 60-year-old Virgil “Dusty” Brewer to aim at the wrong part of Steven Myers’ body as Myers left a Barber County shed. Authorities tracked Myers to the shed last year after he was accused of threatening people with a gun outside a bar in Sun City, about 110 miles (177 kilometers) west of Wichita.

An instructor on use of force and less lethal weapons wrote in the report that Brewer also didn’t use the right kind of round. Brewer is charged with involuntary manslaughter.